Safety catch



E. MoREHoL-JSE 2,353,581

SAFETY CATCH Filed March 3, 1943 2 Sheets-Sheet 1 4 `u` mllllllulmmmATTO N YS E. MoREHousE 2,353,581

SAFETY CATCH `July 11, V1944.

Filed March 5, 1943 2 sheets-sheet 2 ummm INVENTOR ATT RNEYS PatentedJuly 11, 1944 SAFETY CATCH Eugene Morehouse, Providence, R. I., assignorto B. A. Ballou & Co., Inc., a corporation of Rhode Island ApplicationMarch 3, 1943, Serial No. 477,328

Claims. (Cl. 24-157) This invention relates to a iinding member for asafety catch, more particularly to-an inside rotor for the safety catch.

The safety catch of the type having two outside ears with a rotorbetween those ears is usually provided with a slot in the ears of theoutside member and also a slot in the inside member, which slots when inregistry receive a pin stem and move out of registry for the locking ofthe pin stem in the catch. It is usual to slot both the outside andinside member with a cutting tool at one time after the parts have beenassembled. In my prior. Patent No. 2,221,429, dated November 12, 1940, Ihave illustrated one means of kproviding slots in these members withoutusing a cutting tool after assembly. It is not desirable in manyinstancesv to provide a strip of stock of the width necessary to providethe rotor memberin a single piece as shown in this patent andaccordingly a different construction is provided and different steps inthe method of production.

One of the objects of this invention is to -provide the rotor member 'intwo separate individual parts and then assemble these parts vjust priorto the time when they are positionedr into the outside piece orstationary part of the catch. The stationary part of the catch holdingthem in assembled relation.

Another object of the invention is to provide a rotor member formed ofindividual parts suiiciently thin so that each may be slotted bypunching and thereafter assembled into finished form with theconstruction such that the parts will remain in a certain registeredrelation.

Another object of this invention is to provide an arrangementandformation of parts with the use of a minimum amount of stock havingsuch shape that it may be made by press operations.

With these and other objects in view, the invention consists of certainnovel featuresof construction, as will be more fully described andparticularly pointed out in the appended claims.

In the accompanying drawings:

Fig. l is an elevation of the safety catch com'-` plete and in openposition;

2 is an end View thereof;

Fig. 3 is a section on substantially line 3 3 of Fig. 1;

Fig. 4 is a plan view oi one part of the rotor member;

Fig. 5 is an edge view thereof;

Fig. 6 is a plan View of the other part of the rotor member;

Fig, 7 is an edge view thereof, this ligure and Figure 5 being in therelation that they bear one to the other but spread apart;

Fig. 8 is a perspective View of the parts shown in Figs. 6 and 7;

Fig. 9 is a perspective view of the parts shown in Figs. 4 and 5;

Fig. 10 is a perspective view showing the partsin Fig. 8 and Fig. 9brought together in assem-` bled relation;

Fig. 11 is a sectional view of the outside part of the safety catch;

Fig. .1.2 is a sectional-view showing the rotor and outside part inassembled relation;

Fig. 13 is a top plan View of a strip of stock.-

showing the diierent operations as performed thereon in proceeding withthe construction of one part of the rotor member;

Fig. 14 is a sectional view on line |4--I4 of Fig. 13;

Fig. 15 is a top plan view of a strip of stock showing the initialdifferent'steps in the formation of the `companion part of the rotormember;

Fig 16 is a sectional view through the center of the showing in Fig, l5;

Fig. 17 is a sectional view of the part formed as shown in Fig. 16detached from the strip;

Fig. 18 is a plan View of the Separate part of Fig, 17; and

Fig. 19 is a sectional view after a further operation has beenperformed.

In carrying forward this invention I cut out from two separate narrowsheets or ribbons of stock the two parts of the rotor member which areto be assembled together. One part is so shaped as to have a recess init while the other part has a projection to interlock with this recessto prevent relative rotation of the parts one with another. Each of theparts is slotted or an opening is punched in the sheet stock and adrawing occurs to cooperate with this punched slot prior to the cuttinUof the piece from the sheet of stock. Thereafter such cutting orblanking is merely necessary to assemble the two cut-out pieces togetherand position them between the ears for the completion of the catch. Theears serve to hold the two pieces in assembled relation. Theinterlocking parts serve to retain the parts in registry one with theother while so held. The drawing, embossing or deflecting of the stockis termed in the trade as dapping or the result of this step dapped, andI use these terms in this sense herein.

With reference to the drawings, 20 (see Fig. 13) denotes a strip orribbon of sheet stock from which one part of the rotor is formed, while2l denotes a strip or ribbon of sheet stock from which the companionpart of the rotor is formed. The first operation upon the strip stock 20is a punching or cutting out of an opening 22. The strip is thenadvanced to the next station where a clapping, drawing or embossingoperation is formed to provide a cup designated 24 by drawing the stockat the location about the end of the slot in suitable tools for thepurpose. The opening 22 will be so shaped that after distortion bydrawing it will arrive at its proper shape. At the next station asevering operation is formed along the line 25 to remove from the sheetof stock one of the individual and separate pieces which is to beassembled with another piece to form the rotor member and at this sametime form the notch 23.

For the companion part of the rotor I use the strip 2| which at thefirst station is punched out to provide an opening 26. a dappingoperation is performed to draw, dap, or emboss the stock as at 2Tsimilar to the operations performed on the strip 2li. At the nextstation the part is severed fromthe strip along the line 39 beingillustrated as removed from the strip at 3| in Fig. 17. As the severingoperation occurs along the line 30 a linger 28 (see Fig. 19) is formedextending therefrom. This part lodges on a transfer plate and is movedto a location where, -by an operation between dies the finger 28 is bentupwardly at right angles as shown in Fig. 18 while at the same time afinger 29 is sheared from the stock of the part 3| and bent to theposition shown in Fig. 18. The parts formed from the strips of stock 2l]and 2| are illustrated individually in plan view in Figs. 4 and 6wherein there is a disc-like portion 32, handle 33 and slot 34 which arethe same in each of the pieces. These two pieces of Figs, 4 and 6 areplaced in face to face contact with hollow trunnion portions 24 and 21extending in opposite directions (see Figs. 8, 9, and l0) and with theslots 34 in registry and the handles 33 in registry. This registeredrelation is maintained by reason of the recess 23 in the parts shown inFig. 4 and the finger 28 extending into this recess as shown in Fig. 10while a finger 29 is of the size to engage the edges of the two handleswhich are spaced apart and assists in locking the parts against relativerotation.

The outside body member of the safety catch consists of a base portion40 with two upstanding ears 4| and 42 which are slotted as at 43 andrecessed as at 44 to provide bearings for the trunnions 24 and 2l. Theassembly as shown in Fig. 10 is positioned between the ears with thetrunnions 24 and 2'| in recesses 44 and then the ears brought intovertical relation as shown in Figs. 2 and 3 so as to hold the two-partassembly as shown in Fig. 10 while the handles 33 extend outwardlybetween the ears for the manipulation or rotation of the rotor in thebody.

In the showing in Fig. 12 recesses 44' are shown as extending completelythrough the ears 4| and 42 so that the outer ends of the trunnions 24and 21 would be visible on the outer surface of the catch. After thecatch is assembled as shown in Figs. 1-3 or 12 the base is soldered ontoa At the second station suitable support in a position to receive, andretain or lock the pin stem in position.

From the above it will appear that I have eliminated the necessity ofbending of integral halves, which is one of the operations performed inmy patent above-referred to, and substituted therefor the placing of twoparts face to face in assembled relation at the time of positioning therotor member between the ears of the body, the parts which lock the twomembers against relative rotation being formed at the time of cuttingand shaping of the parts during the other necessary operation upon them.The two ears of the body member effectively prevent separation of thesetwo parts and the tying of them together as afforded by the folding isunnecessary.

I claim:

' 1. An inside rotor member for a safety catch to -be positioned betweentwo ears comprising two individual sheet stock pieces each slotted withtheir slots in registry and each cylindrically dapped with their dappedportions extending in opposite directions and interlocking parts betweensaid pieces to prevent relative rotation of said pieces.

2. An inside rotor member for a safety catch to be positioned betweentwo ears comprising two individual sheet stock pieces each slotted andprovided with a handle with their slots and handles in registry and eachdapped with their dapped portions extending in opposite directions toprovide bearing trunnions for relative rotation and interlocking lugsand recesses respectively on said pieces to prevent relative rotation ofsaid pieces.

3. An inside rotor member for a safety catch to be positioned betweentwo ears comprising two individualsheet stock disc shaped pieces eachslotted and provided with a radially extending handle, said pieces beingso related that their slots and handles are in registry and each dappedwith their dapped portions extending in opposite directions to providebearing trunnions for rela tive rotation and interlocking lugs andrecesses respectively on said pieces to prevent relative rotation ofsaid pieces.

4. An inside rotor member for a safety catch to be positioned betweentwo ears comprising two individual sheet stock disc shaped pieces eachslotted and provided with a handle radially extending with their slotsand handles in registry and each dapped with their dapped portionsextending in opposite directions to provide bearing trunnions forrelative rotation and interlocking lugs and recesses respectively onsaid pieces to prevent relative rotation of said pieces.

5. A safety catch comprising a body having spaced ears with :bearingrecesses therein, a rotor member in the space between said earscomprising two individual sheet stock pieces each slotted with theirslots in registry and each dapped with their dapped portions extendingin opposite directions into said bearing recesses to be held by saidears in assembled relation and interlocking lugs and recessesrespectively on

